The Design And Construction Of A Fast Track 16 Hectare, 18 M Deep Basement In Soft Clay In Singapore,
2013
Arup, Hong Kong
The Design And Construction Of A Fast Track 16 Hectare, 18 M Deep Basement In Soft Clay In Singapore, J. W. Pappin
International Conference on Case Histories in Geotechnical Engineering
Singapore’s newest integrated resort, Marina Bay Sands, was completed in record time and has garnered numerous engineering awards. The development sits on recent sand reclamation, which in turn rests on deep soft marine clay deposits. With an average excavation depth of around 18 meters, the 16 hectare (39 acre) waterfront development involved some of the largest marine clay excavation in Singapore. About 2.8 million cubic meters of fill and marine clay were excavated from the site equating to about 800 trucks a day for two years. To overcome the challenges of the bulk excavation and minimize shoring in difficult soil …
Shallow Foundations For Seismic Loads: Design Considerations,
2013
SIU Carbondale, IL
Shallow Foundations For Seismic Loads: Design Considerations, Vijay K. Puri, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
The seismic design of foundations for structures depends on dynamic bearing capacity, dynamic settlements and liquefaction susceptibility of soil. The dynamic bearing capacity problem has been attracting the attention of researchers during the last about fifty years. Till today (2013), there is no accepted dynamic bearing capacity theory. Most analysis for design of shallow foundations under seismic loads are based on the assumption that the failure zones in soil occur along a static failure surface. This is the pseudo-static approach. An attempt has been made in this paper to summarize the currently available information on design of shallow foundations under …
Professor Ralph B. Peck, Our Beloved Professor And Mentor,
2013
Missouri University of Science and Technology
Professor Ralph B. Peck, Our Beloved Professor And Mentor, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
Perhaps more than any other individual, Dr. Ralph B. Peck has served as a guide and leader in the maturing of geotechnical engineering as it has grown in the past 50 years (2013). He has led by example, by the logic of his arguments, clearly transmitting his judgment to student and practitioner alike. He has spoken and written consistently and eloquently on the application of art and science of the practice of subsurface engineering.
Ralph B. Peck – The One-Page Summary,
2013
Albuquerque, NM
Ralph B. Peck – The One-Page Summary, Nancy Peck Young
International Conference on Case Histories in Geotechnical Engineering
Ralph B. Peck’s last big project was the Rion-Antirion Bridge in Greece. It was one of his many long projects and was completed in 2004. It received ASCE’s OPAL (Outstanding Projects and Leaders) Outstanding Civil Engineering Achievement Award for 2005. Dad, my husband Allen and I went to see it upon its completion, one of Dad’s last really big trips. Shortly after the end of the project Dad began to receive calls asking him to work on another large venture. Dad politely answered that he was retired, but the gentlemen persisted in calling him, hoping to get him to accept …
Tunneling In Chicago Clay: Pioneering Work In Ground Control,
2013
University of Illinois at Urbana-Champaign, IL
Tunneling In Chicago Clay: Pioneering Work In Ground Control, Edward J. Cording
International Conference on Case Histories in Geotechnical Engineering
Early in his engineering career, Ralph Peck supervised the soil mechanics investigations during subway construction in the soft clays in Chicago, working under the guidance of Karl Terzaghi. A major focus was to determine what should be done to minimize surface settlements of the streets. Squeeze tests, in which clay displacements and construction events in the tunnel were observed, led to changes that significantly reduced surface settlement. Squeeze test reports prepared by Peck and his soil mechanics team are summarized and selected drawings illustrated. The work provides a first view of Peck’s observational method: “it demonstrated the enormous practical benefits …
Inconclusive Case Histories In Earthquake Geotechnics From Christchurch,
2013
National Technical University, Greece
Inconclusive Case Histories In Earthquake Geotechnics From Christchurch, George Gazetas
International Conference on Case Histories in Geotechnical Engineering
It is argued that there is still a need for further exploratory research to unravel the ultimate causes of unresolved case histories (especially those involving failures) in geotechnical earthquake engineering. Three specific examples motivated from the records of the four major seismic episodes that shook the city of Christchurch, New Zealand, in 2010 and 2011 are presented in detail. Peculiarities in these records call for an investigation of a number of plausible seismological and geotechnical contributing factors including source mechanics, forward-rupture directivity, 1Dsoil amplification, soil liquefaction, 2D basin amplification, and topographic aggravation.
Performance Appraisal Of Ballasted Rail Track Stabilised By Geosynthetic Reinforcement And Shock Mats,
2013
University of Wollongong, Australia
Performance Appraisal Of Ballasted Rail Track Stabilised By Geosynthetic Reinforcement And Shock Mats, Buddhima Indraratna, Sanjay Nimbalkar, Cholachat Rujikiatkamjorn
International Conference on Case Histories in Geotechnical Engineering
Rail tracks serve the principal mode of transportation for bulk freight and passengers in Australia. Ballast is an essential constituent governing the overall stability and performance of rail tracks. However, large repetitive loads from heavy haul and passenger trains often lead to excessive deformation and degradation of the ballast layer, which necessitate frequent and expensive track maintenance works. In Australia, the high cost of track maintenance is often associated with ballast degradation, fouling (e.g. coal and subgrade soil) and associated poor drainage, differential settlement of track, pumping of subgrade soils, and track misalignment due to excessive lateral movements. With increased …
Performance Of Two Geosynthetics-Lined Landfills In The Northridge Earthquake,
2013
Arizona State University, Tempe, AZ
Performance Of Two Geosynthetics-Lined Landfills In The Northridge Earthquake, Edward Kavazanjian Jr., Mohamed Arab, Neven Matasovic
International Conference on Case Histories in Geotechnical Engineering
Analyses of the performance of the Chiquita Canyon and Lopez Canyon landfills in the 1994 Magnitude 6.7 Northridge earthquake illustrate deficiencies in the current state-of-practice for seismic design of geosynthetic liner systems and the promise of a new state-of-the-art method for performance-based design, and suggest necessary modifications to construction quality assurance procedures for geosynthetic liner systems. Analyses of the Chiquita Canyon landfill case history using the conventional state-of-practice Newmark Analysis approach fail to predict the tears observed at the landfill following the earthquake in the side slope liner geomembrane at two different locations. However, the state-of-the-art finite difference based method …
Probabilistic Geotechnical Analyses For Offshore Facilities,
2013
Norwegian Geotechnical Institute, Norway
Probabilistic Geotechnical Analyses For Offshore Facilities, Suzanne Lacasse, Farrokh Nadim
International Conference on Case Histories in Geotechnical Engineering
Society requires increasingly that the hazard and risk associated with engineered constructions be quantified. The paper presents ge-otechnical hazard assessment in the context of a risk framework. Concepts of uncertainties, reliability, safety and risk are briefly re-viewed. The use of the approach is exemplified for offshore facilities, including a piled foundation, a gravity foundation, a jack-up structure and underwater slopes. The applications demonstrate that probabilistic analyses complement the conventional deterministic safety factor and deformation-based analyses, and contribute to achieving a safer and optimum design. The conclusions emphasize the usefulness of a risk assessment, the importance of engineering judgment in the …
Cowboys Stadium Roof Arch Foundations — Revisited,
2013
Oklahoma State University, Stillwater, OK
Cowboys Stadium Roof Arch Foundations — Revisited, Garry H. Gregory
International Conference on Case Histories in Geotechnical Engineering
One of the challenging engineering aspects of the new Cowboys Stadium in Arlington, Texas was design of foundations for the retractable roof arches. The two arches, with a clear span of approximately 1,290 ft, produce a lateral thrust of approximately 19,500 kips at each foundation. The Author was on a consultancy board related to foundation design with Mr. Clyde Baker during the design phase of the project. Design criteria included a maximum allowable deflection of approximately 0.5 inches for the foundations. Adding to the complexity was the varying geologic conditions at each arch foundation location. After eliminating numerous options, the …
Luncheon To Honor Dr. Shamsher Prakash,
2013
Missouri University of Science and Technology
Luncheon To Honor Dr. Shamsher Prakash, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Improvement Of Dynamic Soil Properties Induced By Preloading Verified By A Field Test And Embankment Failure,
2013
Stamatopoulos and Associates Co., Greece
Improvement Of Dynamic Soil Properties Induced By Preloading Verified By A Field Test And Embankment Failure, K. Stamatopoulos, P. Petridis, P. S. Allkja, G. Vatselas, A. Small
International Conference on Case Histories in Geotechnical Engineering
The results of an elaborate field preloading study on a liquefaction-susceptible site are presented. Preloading was applied by a temporary embankment 9m high. Prior and after preloading, borings with standard penetration tests, cone penetration tests and geophysical studies were performed. During the process of embankment construction and demolition, settlements, excess pore pressures and vertical and horizontal stresses were recorded versus time at different locations. A partial embankment failure occurred during the preloading process. A method predicting failure during the construction of the preload embankment based on excess pore pressure measurements is proposed and verified.
A Comprehensive Model For Anaerobic Degradation In Bio-Reactor Landfills,
2013
New Jersey Institute of Technology, Newark, NJ
A Comprehensive Model For Anaerobic Degradation In Bio-Reactor Landfills, Jay N. Meegoda, S. Bhuvaneshwari, P. A. Hettiaratchi, H. Hettiarachchi
International Conference on Case Histories in Geotechnical Engineering
A new generation of sustainable landfill was designed and constructed in the City of Calgary, Canada to achieve sustainable municipal solid waste (MSW) management. This sustainable landfill called “biocell” involves sequential operation of a landfill cell to produce methane gas during the first stage of anaerobic degradation and in-situ composting within the cell footprint. Once methane recovery is minimal, the second stage aerobic degradation initiated by injecting air through methane recovery system and finally landfill is mined for resource and space recovery in the third stage. The resources that can be recovered include compost like material and recyclables such as …
An Assessment Of Soil Collapsibility Due Dissolution Of Salts,
2013
Fahad Bin Sultan University, Saudi Arabia
An Assessment Of Soil Collapsibility Due Dissolution Of Salts, Omar Alhattamleh
International Conference on Case Histories in Geotechnical Engineering
Since the building of first dike in the Dead Sea (DS) 60 years ago, the DS harsh environment sparks new geotechnical challenges. The DS level as well as the surrounding ground water table continued to drop severely. The DS level drops 35 m from 392 mbsl in late 1950s to around 423 mbsl in 2011. Recently, the rate of descending is 1.2 m/year and is on brink to increase. The dramatically dropping of the DS level pushes fresh water brackish water divide and generates numerous sink holes in the southern part of the east coast of the DS. The thing …
Application Of Nanomaterial To Stabilize A Weak Soil,
2013
Iran University of Science and Technology, Iran
Application Of Nanomaterial To Stabilize A Weak Soil, Seyedi Gelsefidi Seyed Alireza, Mirkazemi Seyed Mohammad, Baziar Mohammad Hasan
International Conference on Case Histories in Geotechnical Engineering
There are little investigations in the literature on the nanotechnology's application in the geothecnical field. Since, lots of soil and rock minerals are nanomaterial and their chemical reactions are in the nano-scale, there is a great potential for the use of this technology in different fields of geothecnical engineering such as seepage, grouting, soil stabilization and etc. In this study the stabilization of a weak soil was investigated using nanomaterial. The weak soil was obtained from Boodian Road in North of Iran and classified as low plasticity clay. Fifty CBR tests were conducted in this study. At the first step …
Case Studies On Application Of Coir Geotextiles For Soil Stabilization,
2013
Cochin University of Science And Technology, India
Case Studies On Application Of Coir Geotextiles For Soil Stabilization, K. S. Beena
International Conference on Case Histories in Geotechnical Engineering
Coir geotextiles (Coir Bhoovastra) is one of the non-traditional highly demanded and promising coir product with multi usages as eco-friendly, sustainable and substitutable product for many Civil Engineering applications especially in Geotechnical Engineering. Coir Geo-textiles is an emerging area of coir industry. Kerala, the major coir producing state in India is fast growing in the development and application of Coir Geotextile. Coir Geotextile development program is also intended to popularize the coir products as geotextile material in National & International level and to provide internationally accepted standardization for coir geotextile. The use of Coir geotextile is well established in areas …
Caverns In The Ground Under Thermal Power Plant, Caused By Static Electricity And Chemically Aggressive Water,
2013
University of Transport “Todor Kableshkov”, Bulgaria
Caverns In The Ground Under Thermal Power Plant, Caused By Static Electricity And Chemically Aggressive Water, Chavdar Vassilev Kolev, Gergana Vassileva Gevezova
International Conference on Case Histories in Geotechnical Engineering
A relatively rare phenomenon is discussed in the bellow report. Some deformations and subsidences of the road pavement and of some facilities of the plant for chemically contaminated water in Sofia Thermal Power Plant are examined here. A danger of demolishing of large ponds of sediment water, as well as of incidences with the high steel poles for high voltage were highly possible to happen if current situation is retained. Various studies with this topic have been conducted - geophysical, such as geo-radar, electro-tomographical and drilling ones (with short boreholes). Laboratory and field studies of the ground have been also …
Compaction Grouting For Seismic Retrofit Of The North Torrey Pines Bridge,
2013
Kleinfelder/ University of California San Diego, CA
Compaction Grouting For Seismic Retrofit Of The North Torrey Pines Bridge, James R. Gingery, Sunil Arora
International Conference on Case Histories in Geotechnical Engineering
The North Torrey Pines Road Bridge in Del Mar, California was built in 1933 and is eligible for listing in the National Register of Historic Places. As a result of its outdated design and deterioration in a corrosive saline environment, the bridge was classified as structurally and seismically deficient and functionally obsolete. The historic significance of this bridge is important to the surrounding community and thus a seismic retrofit project was initiated with the goal of improving the expected seismic performance of the bridge while preserving its aesthetic and historic character. This paper provides a brief description of the overall …
Dynamic Properties Of Stabilized Subgrade Clay Soil,
2013
Indian Institute of Technology Kanpur, India
Dynamic Properties Of Stabilized Subgrade Clay Soil, Argaw Asha Ashango, Nihar Ranjan Patra
International Conference on Case Histories in Geotechnical Engineering
Expansive soils are fine-grained soils that can undergo a significant volume change due to the variation of water content. A change in the water content of weak subgrade material under the roadway is a cause for the damage of the road pavement. During an earthquake, the soft clay will lose the small shear strength it possesses which causes cracks and movements of the road. In the present study, soil samples were collected from Banda, Uttar Pradesh, India. The study area is at risk for seismic damage due to Himalayan frontal fault earthquakes. The soils samples are highly expansive in nature …
Ground Improvement And Settlement Monitoring Program For A Power Plant Project,
2013
CH2M HILL, Santa Ana, CA
Ground Improvement And Settlement Monitoring Program For A Power Plant Project, John J. W. Lee, Ravee Raveendra, Curt Basnett, Yoga Chandran, Robert Howard, Roy Snover
International Conference on Case Histories in Geotechnical Engineering
CH2M HILL is providing engineering, procurement, and construction services for a power plant project in Utah. Before beginning construction on the power plant, geotechnical studies were performed to characterize the subsurface conditions for the anticipated settlement and to determine a ground improvement method to accelerate the construction period. Ground improvement with wick drains and surcharge fill placement was carried out to improve the soft soil conditions at the project site. Settlement monitoring instrumentations were installed before placing structural fill and surcharge fill. An extensive settlement monitoring program was also implemented inside and around the perimeter of the project site to …
